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Preparation method of rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration ability

A technology of rare earth ions and transparent ceramics, applied in the field of preparation of rare earth Ce3+/Eu2+ doped MgAlON transparent ceramics, achieving high mechanical strength, high optical transmittance, and simple process

Active Publication Date: 2015-10-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth mentioning that the current research is mainly based on glass substrates, that is to say, for ideal windows and transparent armor materials that can be used in harsh environments (space exploration and battlefields), such as sapphire and AlON, there is almost no direct research. Doping Rare Earth Ions to Obtain Ultraviolet Filtering Properties

Method used

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  • Preparation method of rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration ability
  • Preparation method of rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration ability
  • Preparation method of rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration ability

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Embodiment 1

[0031] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0032] 1) Weigh 99.8g of synthesized MgAlON (the mass ratio of its raw material to α-Al 2 O:AlN:MgO=76.45:18.53:5.02) and 0.2g Eu 2 o 3 Put the raw materials into the mixing tank according to the ball-to-material ratio of 4:1 and use absolute ethanol as the medium for ball milling and mixing, and obtain slurry (powder slurry) after ball milling for 24 hours;

[0033] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve to obtain a sieved powder;

[0034] 3) Weighing 2 g of the sieved powder and placing it in a steel mold, forming a ceramic green body with a diameter of about 20 mm and a thickness of about 4 mm at a pressure of 20 MPa, and obtaining a high-density ceramic green body after cold isostatic pressing at 200 MPa;

[0035] 4) The high-density ceramic body is placed in a pressure sintering furnace (high-t...

Embodiment 2

[0039] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0040] 1) Weigh 98g of synthesized MgAlON (its raw material mass ratio α-Al 2 O: AlN: MgO = 80.36: 14.52: 5.12) ceramic powder and 2g Eu 2 o 3 Put the raw materials into the mixing tank according to the ball-to-material ratio of 3:1 and use absolute ethanol as the medium for ball milling and mixing, and obtain slurry (powder slurry) after ball milling for 24 hours;

[0041] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve to obtain a sieved powder;

[0042] 3) Weigh 2 g of the sieved powder and place it in a steel mold, and shape it into a ceramic green body with a diameter of about 20 mm and a thickness of about 3.7 mm at a pressure of 50 MPa, and obtain a high-density ceramic after 200 MPa cold isostatic pressing Body;

[0043] 4) The high-density ceramic body is placed in a high-temperature atmosphere fur...

Embodiment 3

[0047] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0048] 1) Weigh 99.98g of synthesized MgAlON (the mass ratio of its raw material to α-Al 2 O:AlN:MgO=88.77:3.79:7.44) ceramic powder and 0.02g CeO 2 Put the raw materials into the mixing tank according to the ball-to-material ratio of 2:1 and use absolute ethanol as the medium for ball milling and mixing. After 24 hours of ball milling, the slurry is obtained.

[0049] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve;

[0050] 3) Weigh 2 g of the sieved powder and place it in a steel mold, and shape it into a ceramic green body with a diameter of about 20 mm and a thickness of about 4 mm at a pressure of 20 MPa, and obtain a high-density ceramic green body after cold isostatic pressing at 200 MPa ;

[0051] 4) The high-density ceramic body is placed in a high-temperature atmosphere furnace, filled with about ...

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Abstract

The invention relates to a preparation method of a ceramic material, and concretely relates to a preparation method of a rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration ability. The preparation method comprises the following steps: 1, mixing MgAlON with one selected from Eu2O3 and CeO2 or a mixture containing Eu2O3 and CeO2 according to an arbitrary ratio, and carrying out ball milling for 6-24h to obtain a powder slurry; 2, drying, and sieving; 3, carrying out axial pressure molding to form a ceramic biscuit, and carrying out cold isostatic pressing treatment; 4, putting the ceramic biscuit in a gas pressure sintering furnace; and 5, carrying out grinding and polishing treatment to obtain the rare earth ion-doped MgAlON transparent ceramic material with high optical transmittance. The transparent ceramic material has certain ultraviolet absorption ability, and has high optical transmittance in visible light and infrared regions. The method realizes regulation of the ultraviolet transmittance performance by introducing rare earth ions into a transparent ceramic system for the first time, and the process is simple. The rare earth ion-doped MgAlON transparent ceramic material has wide application prospect in transparent armoring as an aviation and spaceflight window materials.

Description

technical field [0001] The present invention relates to a kind of preparation method of ceramic material, particularly a kind of rare earth Ce 3+ / Eu 2+ The invention discloses a method for preparing transparent ceramics doped with MgAlON. The transparent ceramic material is suitable for preparing functional transparent ceramic windows and special transparent armor materials with short-wave ultraviolet filtering capabilities. Background technique [0002] MgAlON is a kind of MgO-Al 2 o 3 - A compound with a cubic spinel structure composed of AlN three-component system. Single-phase, sintered and dense polycrystalline MgAlON transparent ceramics have excellent thermal, optical and mechanical properties. The optical transmittance in the visible and infrared regions can reach 84%, the transmission range is 0.22-6.24μm, and the Vickers hardness is about It is 13.4GPa, and the bending strength can reach 274MPa. Its mechanical properties are significantly higher than that of ...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/622
Inventor 王皓刘鑫陈博文涂兵田王为民傅正义
Owner WUHAN UNIV OF TECH